Stereotype-pah



R, D. MOTT. STEREOTYPB PAN.

No. 10,704. I Patented Mar. 28, 1854.

Fig 8 m: Noam; PETERS co. PHoTo-utno. WASHINGTON. 01c.

RIGHD; Di'M-OTT. OF SPRING GARDEN, PENNSYLVANTA;

STEREOTYIiE-PAN.

Specification of Letters Patent No. 10,704, dated March 28, 185$;

To all whom it may concern:

Be it known that I, RIcHARuDrxoN MoTT,

Y of Spring Garden,'in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement on Stereotype-Pans; and I do hereby declare.

that the following is a full, clear, and exact description of the construction and opera,- tion of the same, reference being had to the annexed drawings, making a part of this Specification, in which Figure 1, is a perspective view, showing the three several parts of the pan separated.

.1, is a side view of the same, having the front part of the pan removed, in order to show the interior, and Fig. 3, is a plan view a of the upper side of the casting plate, havrecessed corners of the plate.

The same letters and figures, refer to like parts when in the different drawings.

This improvement is designed for casting metallic stereotype plates', ofuniform thickness, with plaster of Paris molds, in horizontal pans, and consists of an iron box or pan (A) and lid (B) constructed of the usual shape and size, and a casting late (C) (instead of a floater upon 0th sides of which any required number of beveled projections, grooves, or attachments (D, D, D,) are constructed, forming receptacles for the plaster molds (E, E, E) and by means of which attachments or grooves,

the said plaster of Paris molds are retained. close up to, and with their faces parallel with the surfaces of the casting plate, as shown in Fig. 2. The said beveled attache ments or grooves being so constructed at their ends as to present beveled or chiselk like cutting edges (1, 1, 1, l) or their equivalents which cut from the edges of the sides of the plaster of Paris molds'(whatever of excess the said molds may have in widthgreater than the spaces between any two of the said attachments or grooves) when the plaster molds are forced into their proper positions between them and against the faces of the casting plate, as shown in Fig.2. By having cutting edges attached to the plate I obviate the objection arising from the.

unequal shrinking of the molds in drying or baking and the consequent difficulty of trimming them to fit the receptacles before baking.

- ing it in before casting.

At each end of these attachments or' grooves (D, D, D) asmall-recess or-=-chan-- nel, or its equivalent (2,2, 2) is made,'next.

to the 'plate, of a suflicient size'to allowthe ;melted'stereotype metal to flow freely to the plaster molds, whichit enters through'the': small notches (3, 3, 3) cut on each end of" the molds acrossthe raised edges next to the casting platethe pressure arising from est cavities.

lid (13,) have their extreme points cut away sufficiently, as shown at 4, 4:,to allow the melted metal to enter the pan and also the 1 under side of the casting plate.

j The attachments or grooved projections: mg one of the cross projections, grooves, or (D, D, D,) maybe secured permanently to:

attachments, removed, in order'to show the I the plate (C) or they may be made adv gustable when ad ustable they may be se-. I ourely'fastened to theplate by means of screwsthese being made severalproperly 5 adaptedsets of screwiholes'in-the plate, so

that the'attachments'may be shifted and so cured at pleasure, to suit various sizes of .molds the unoccupied holes in the plates being filled with flush screws adapted thereto.

The pan, its lid, and casting plate with its attachments, are intended to be constructed or iron. At each end of the casting plate, onthe two end attachments or grooved projections, a small iron pinis inserted across the middle ofa groove or depression therein (as shown at 5,) forthe purpose of furnish: ing-a hold at each end of the plate for lift- Having thus described improvement in the stereotype pan, I will proceed to describe the mode of operation.

After the plaster molds from which the stereotype plates are to be made are properly baked in the usual manner and degree, they are severally pressed each within a palr of the projections, or grooved attachment-s by the operator holding the plate and mold and sliding the said mold with its face up against the face of the said plate, while the cutting edges shave the molds until they have passed to their proper posit-ions therein as shown 1n Fig. 2 The casting plate is then placed in the pan and the lid placed upon it, (thus securing the casting-plate between the *lid; and bottom of thepan) as shown 1n the a 110 same figure. The usual clamp and screw is now put on to secure the wholetogether,

and illustrated my and it isready for sinking-'intothe-melted metal, which part of the process being understood by all stereotypers, it is unnecessary here to describe. The advantages of. this improved mode of constructing stereotype pans over the one now in use, having what is technically called a floater instead of the casting plate herein described, areFirst, the plates can be cast of a uniform thickness, and so near the required standard as to save at the lowest computation, seventy-five per cent. in shaving down the plates during the process of finishing;'second, two casts can be made at one immersion of the pan; third, the greater ease and facility with which the stereotype plates can be removed from the casting plate when the cast is cooled; fourth, the trouble and expense of backing up thin plates (very often necessary'in the plan now in use) may be avoided, and, sixth, the cast ing plates are less liable to be broken than the floaters now in use, as very little force or hammering will be necessary to remove the stereotype plates after the cast is made. The peculiarity of this improvement on stereotype pans, consists in the substitution anduse ofthe casting plate (C) with its adjustablebeveled attachments (D D D) having chisel-like cuttingedges (1, 1, 1, 1,) on their ends for cutting and trimming the single faced plaster molds as they are forced between them-eons plate only being used,

but havingboth its sides fitted with the cut- I ting-edged attachments, and the plate held down near the middle height of the pan in a horizontal position, during the process of proceed to state that I do not claim the pan proper, nor its lid, as these are common; but What I claim as my invention and desire to secure by Letters Patent is i The substitution and use in: stereotype pans of a single horizontalcasting plate (G) combined with the adjustable attachments (D D D D) for holding the single faced plaster molds; the said attachments having chisel-like cutting edges (1, 1, 1,1,) on their ends, for cutting and trimming, the :said molds as they are forced by the operator ;bea tween them and the plate andthe said cast-y ing plate having both its sides fitted with the cutting-edged. attachments; structedsubstantially and for the purposees as herein described and illustrated RICHARD DIXON MOTT,

Witnesses a BENJ. MoRIsoN, WILLIAMS OGLE.

all 0011-, 

